Dear Mrs J, Make sure you don't sell yourselves cheap. The US Bureau of Economic Analysis put Michigan's GDP at $382bn in 2007. This attempts to measure the value added to all goods and services in Michigan - anything from haircuts to assembling a car - but does not include components imported from outside the state.
That $382bn figure puts Michigan into the top 25 economies in the world. Even China's GDP is less than nine times greater.
So how much would it cost to buy $382bn of productive power? No corporation adds nearly as much value; the economist Paul de Grauwe reckoned that in 2000, value added was $67bn for Wal-Mart and $53bn for Exxon, the two largest companies. Their market value at the time was about five times their value added.